CN116087801B - Battery testing circuit and method - Google Patents
Battery testing circuit and method Download PDFInfo
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- CN116087801B CN116087801B CN202211608279.2A CN202211608279A CN116087801B CN 116087801 B CN116087801 B CN 116087801B CN 202211608279 A CN202211608279 A CN 202211608279A CN 116087801 B CN116087801 B CN 116087801B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The application discloses a battery test circuit and a method, which are used for testing a high-voltage battery, wherein the battery test circuit comprises an alternating-current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage-reducing circuits and an inductor; the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through an inductor; therefore, the battery test circuit provided by the application provides the working voltage of the battery to be tested through the at least two voltage reduction circuits, reduces the working voltage of the insulated gate bipolar transistor IGBT in the voltage reduction circuits, enables the battery test circuit to select the IGBT with the lower voltage level, has high switching frequency and high dynamic response speed, and improves the efficiency of high-voltage battery test.
Description
Technical Field
The application relates to the technical field of battery testing, in particular to a battery testing circuit and a battery testing method.
Background
With the continuous development of battery technology, the capacity of the battery is increased, and the voltage of the battery is increased. Currently, the voltage of the energy storage battery is 1500V at maximum, and there is a trend to continue to increase upwards. The test conditions such as the electric quantity or the dynamic working condition of the high-voltage battery have very important significance for safe use.
Currently, existing battery test circuits can be divided into two types:
a scheme adopts a rectifying circuit to test a battery, but the rectifying circuit has low measurement accuracy and cannot measure a high-voltage battery; in order to solve this problem, another solution may be to connect a step-down circuit after the rectifying circuit to test the high voltage battery. However, when the circuit tests the high-voltage battery, an insulated gate bipolar transistor (Insulated Gate Bipolar Transistor, IGBT) with a higher voltage level is required to be used, and the working voltage of the IGBT with the higher voltage level is high, so that the switching frequency is low and the dynamic response is poor, and further, the efficiency of testing the high-voltage battery is low.
In summary, how to improve the efficiency of high-voltage battery testing is a technical problem to be solved.
Disclosure of Invention
In view of the above, the embodiments of the present application provide a battery testing circuit and a method for improving the efficiency of testing a high-voltage battery.
In a first aspect, an embodiment of the present application provides a battery test circuit for testing a high-voltage battery, including:
the device comprises an alternating-current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage reduction circuits and an inductor; the input end of the rectifying circuit is connected with the alternating voltage source, and the output end of the rectifying circuit is connected with the input ends of the at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through the inductor;
the alternating voltage source is used for providing alternating voltage;
the rectification circuit is used for converting the alternating voltage into direct voltage;
the at least two isolation circuits are used for isolating the direct-current voltage into at least two paths of independent voltages;
the at least two voltage reduction circuits are used for converting the at least two paths of independent voltages into working voltages of the battery to be tested;
the inductor is used for obtaining the current output by the battery to be tested, comparing the current with a preset current, and obtaining the test result of the battery to be tested.
Optionally, the at least two voltage reducing circuits comprise M voltage reducing circuits, wherein M is more than or equal to 2; the output ends of M-1 voltage reduction circuits in the M voltage reduction circuits are connected with the second input ends of adjacent voltage reduction circuits, and the output ends of voltage reduction circuits except for the M-1 voltage reduction circuits in the M voltage reduction circuits are connected with the battery to be tested through the inductor.
Optionally, the at least two voltage-reducing circuits include N voltage-reducing circuits, N > 3, N being an even number; the second input ends of 2 voltage reduction circuits in the N voltage reduction circuits are connected, the output ends of N-2 voltage reduction circuits comprising the 2 voltage reduction circuits are connected with the second input ends of adjacent voltage reduction circuits, and the output ends of 2 voltage reduction circuits except the N-2 voltage reduction circuits in the N voltage reduction circuits are connected with the battery to be tested through two inductors.
Optionally, the N voltage step-down circuits include N voltage step-down circuits configured symmetrically.
Optionally, the circuit further comprises: a controller; the controller is connected with the output ends of the at least two voltage reduction circuits; the at least two voltage reduction circuits comprise a plurality of first Insulated Gate Bipolar Transistors (IGBT);
and the controller is used for controlling the on-off of the first IGBTs.
Optionally, the controller is further configured to sample a current of the inductor.
Optionally, the rectifying circuit includes a plurality of second IGBTs;
the controller is also used for controlling the on-off of the plurality of second IGBTs.
Optionally, the rectifying circuit includes a capacitor; the capacitor is connected with the input ends of the at least two isolation circuits;
the capacitor is used for stabilizing the direct-current voltage;
the controller is also used for sampling the voltage of the capacitor.
In a second aspect, an embodiment of the present application provides a battery testing method applied to a battery testing circuit, where the battery testing circuit is used for testing a high-voltage battery, and the battery testing circuit includes: the device comprises an alternating current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage reduction circuits, an alternating current voltage source and an inductor; the input end of the rectifying circuit is connected with the alternating voltage source, and the output end of the rectifying circuit is connected with the input ends of the at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through the inductor; the method comprises the following steps:
the battery to be tested acquires working voltage through the at least two voltage reduction circuits;
and the battery to be tested outputs current to the inductor so as to be compared with a preset current, and a test result of the battery to be tested is obtained.
In a third aspect, an embodiment of the present application provides a battery test apparatus, the apparatus including:
a memory for storing a computer program;
a processor for executing the computer program to cause the device to execute the battery testing method of the foregoing second aspect.
In a fourth aspect, an embodiment of the present application provides a computer storage medium, where a computer program is stored, and when the computer program is executed, a device running the computer program implements the battery testing method described in the second aspect.
Compared with the prior art, the embodiment of the application has the following beneficial effects:
the embodiment of the application provides a battery test circuit and a method, wherein the battery test circuit is used for testing a high-voltage battery and comprises an alternating-current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage-reducing circuits and an inductor; the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through an inductor; an alternating voltage source for providing an alternating voltage; a rectifying circuit for converting an alternating voltage into a direct voltage; the at least two isolation circuits are used for isolating the direct-current voltage into at least two paths of independent voltages; the at least two voltage reduction circuits are used for converting at least two paths of independent voltages into working voltages of the battery to be tested; and the inductor is used for obtaining the current output by the battery to be tested, comparing the current with the preset current and obtaining the test result of the battery to be tested.
Therefore, the battery test circuit provided by the application has the advantages that the direct-current voltage obtained by conversion of the rectifying circuit is isolated into at least two paths of independent voltages through the at least two isolating circuits, the at least two paths of independent voltages are converted into the working voltage of the battery to be tested through the at least two voltage reducing circuits, the working voltage of the battery to be tested is provided by the at least two voltage reducing circuits, the working voltage of the IGBT in the voltage reducing circuits is reduced, the battery test circuit can select the IGBT with a lower voltage level, the IGBT with the lower voltage level has high switching frequency and high dynamic response speed, and the efficiency of testing the high-voltage battery is improved.
Drawings
In order to more clearly illustrate this embodiment or the technical solutions of the prior art, the drawings that are required for the description of the embodiment or the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a battery testing circuit according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a specific battery testing circuit according to an embodiment of the present application;
FIG. 3 is a schematic diagram of another specific battery testing circuit according to an embodiment of the present application;
fig. 4 is a flowchart of a battery testing method according to an embodiment of the present application.
Detailed Description
In order to make the present application better understood by those skilled in the art, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Currently, existing battery test circuits can be divided into two types: a scheme adopts a rectifying circuit to test a battery, but the accuracy of the circuit measurement is low, and the high-voltage battery cannot be measured; in order to solve this problem, another solution may be to connect a step-down circuit after the rectifying circuit to test the high voltage battery. However, when the circuit tests the high-voltage battery, the IGBT with a higher voltage level is required to be selected, and the working voltage of the IGBT with the higher voltage level is high, so that the switching frequency is low and the dynamic response is poor, and further the efficiency of testing the high-voltage battery is low. In summary, how to improve the efficiency of high-voltage battery testing is a technical problem to be solved.
In order to solve the above problems, embodiments of the present application provide a battery test circuit and a method, where the battery test circuit is used for testing a high-voltage battery, and includes an ac voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage-reducing circuits, and an inductor; the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through an inductor; an alternating voltage source for providing an alternating voltage; a rectifying circuit for converting an alternating voltage into a direct voltage; the at least two isolation circuits are used for isolating the direct-current voltage into at least two paths of independent voltages; the at least two voltage reduction circuits are used for converting at least two paths of independent voltages into working voltages of the battery to be tested; and the inductor is used for obtaining the current output by the battery to be tested, comparing the current with the preset current and obtaining the test result of the battery to be tested. Therefore, the battery test circuit provided by the application has the advantages that the direct-current voltage obtained by conversion of the rectifying circuit is isolated into at least two paths of independent voltages through the at least two isolating circuits, the at least two paths of independent voltages are converted into the working voltage of the battery to be tested through the at least two voltage reducing circuits, the working voltage of the battery to be tested is provided by the at least two voltage reducing circuits, the working voltage of the IGBT in the voltage reducing circuits is reduced, the battery test circuit can select the IGBT with a lower voltage level, the IGBT with the lower voltage level has high switching frequency and high dynamic response speed, and the efficiency of testing the high-voltage battery is improved.
Referring to fig. 1, the schematic structure of a battery testing circuit according to an embodiment of the present application is shown in fig. 1, where the battery testing circuit is used for testing a high-voltage battery, and the battery testing circuit may specifically include: the device comprises an alternating-current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage reduction circuits and an inductor;
the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of at least two isolation circuits;
the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits;
the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through an inductor;
an ac voltage source for providing an ac voltage.
The alternating voltage source can be 380V three-phase alternating voltage or 600V three-phase alternating voltage. Of course, other ac voltages may be used without affecting the implementation of embodiments of the present application.
And the rectification circuit is used for converting the alternating current voltage into direct current voltage.
The rectifying circuit may be a bridge rectifying circuit, a half-wave rectifying circuit, or a full-wave rectifying circuit. Of course, other forms of rectifying circuits are also possible without affecting the implementation of the embodiments of the present application. The rectifying devices adopted by the rectifying circuit can be IGBT, uncontrollable rectifying diode, silicon controlled rectifier, power transistor or turn-off thyristor and the like; the control method of the finishing circuit can be a single-phase pulse width modulation method, an indirect current control method and the like. Of course, other rectifying devices or other control methods are also possible, and do not affect the implementation of the embodiments of the present application.
And the at least two isolation circuits are used for isolating the direct-current voltage into at least two paths of independent voltages.
The isolation circuit can be a full-bridge rectification circuit or a half-bridge rectification circuit; the device of the isolation circuit may employ an IGBT. Of course, other rectifying circuits or other devices may be used without affecting the implementation of the embodiments of the present application.
And the at least two voltage reduction circuits are used for converting at least two paths of independent voltages into working voltages of the battery to be tested.
The step-down circuit can be a direct current-direct current (DC-DC) step-down circuit; the device of the step-down circuit may be an IGBT. Of course, other step-down circuits or other devices may be used without affecting the implementation of the embodiments of the present application.
And the inductor is used for obtaining the current output by the battery to be tested, comparing the current with the preset current and obtaining the test result of the battery to be tested.
The preset current can be a fixed value, and the current output by the battery to be detected, which is obtained by the inductor, is measured to determine whether the current is the preset fixed value or not; the preset current can also be a current value which is changed continuously, and the current change of the battery output to be detected, which is obtained by the inductor, is measured to determine whether the current change is consistent with the change of the preset current; of course, other preset currents are also possible, and do not affect the implementation of the embodiments of the present application. If the current output by the battery to be detected is consistent with the preset current, a test result of passing the test of the battery to be detected is obtained, and if the current output by the battery to be detected is inconsistent with the preset current, a test result of failing the test of the battery to be detected is obtained.
The battery to be detected is a battery with high voltage class, and can be a high-voltage energy storage battery with the voltage of more than 1500V. Of course, other voltage class high voltage batteries are also possible without affecting the implementation of the embodiments of the present application.
As a battery test circuit, at least two voltage-reducing circuits may include M voltage-reducing circuits, M may be 2 or more; the output ends of M-1 voltage reduction circuits in the M voltage reduction circuits are connected with the second input ends of the adjacent voltage reduction circuits, and the output ends of the voltage reduction circuits except the M-1 voltage reduction circuits in the M voltage reduction circuits are connected with the battery to be tested through an inductor.
For example, referring to fig. 2, a schematic diagram of a specific battery testing circuit according to an embodiment of the present application is shown. As shown in connection with fig. 2, the battery test circuit may specifically include: the device comprises a rectifying circuit, 6 isolation circuits, 6 voltage reduction circuits, 1 inductor L1 and a battery BAT1 to be tested; the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of the 6 isolation circuits; the output ends of the 6 isolation circuits are connected with the first input ends of the 6 voltage reduction circuits; the output ends of 5 voltage reduction circuits in the 6 voltage reduction circuits are connected with the second input end of the adjacent voltage reduction circuit, and the output ends of 1 voltage reduction circuit except the 5 voltage reduction circuits in the 6 voltage reduction circuits are connected with the battery to be tested through an inductor; Q1-Q92 are IGBT1-IGBT92, C1-C8 are capacitors, and T1-T6 are transformers.
The rectifying circuit, the isolating circuit and the step-down circuit all comprise IGBTs, when +15V voltage is applied between the gate electrode and the emitter electrode of the IGBTs, the collector electrode and the emitter electrode of the IGBTs are conducted, and when-8V voltage is applied between the gate electrode and the emitter electrode of the IGBTs, the collector electrode and the emitter electrode of the IGBTs are turned off; the rectifying circuit is a three-level rectifying circuit, the IGBT1-IGBT12 and the diode D1-D6 form a power part of the three-level rectifying circuit, the IGBT1-IGBT12 converts alternating voltage of an alternating voltage source connected with a U, V port and a W port into direct voltage, the main function of the three-level rectifying circuit is completed, the D1-D6 completes clamping of the three-level rectifying circuit, and the voltage drop of the IGBT1-IGBT12 is ensured not to exceed half of direct current bus voltage; at least two isolation circuits are 6 paths of full-bridge isolation circuits, and the IGBT 21-IGBT 68 is used for completing the main functions of the isolation circuits and converting direct-current voltage output by the three-level rectifying circuit into 6 paths of independent voltages; at least two step-down circuits are cascade step-down circuits, and the IGBT 80-IGBT 92 completes the cascade function of the step-down circuits, and through the cascade step-down circuits, the working voltage of the IGBT 80-IGBT 92 is reduced, so that a lower-grade IGBT can be selected, and the efficiency of testing the high-voltage battery is improved.
As a battery test circuit, at least two voltage-reducing circuits may include N voltage-reducing circuits, N may be an even number greater than 3; the second input ends of 2 voltage reduction circuits in the N voltage reduction circuits are mutually connected, the output ends of N-2 voltage reduction circuits in the N voltage reduction circuits, which comprise the 2 voltage reduction circuits with the second input ends connected in series, are connected with the second input ends of the adjacent voltage reduction circuits, and the output ends of the remaining 2 voltage reduction circuits in the N voltage reduction circuits except the N-2 voltage reduction circuits are connected with the battery to be tested through two inductors.
As one of the battery test circuits, the N voltage step-down circuits may include N voltage step-down circuits arranged symmetrically.
For example, referring to fig. 3, a schematic diagram of another specific battery testing circuit according to an embodiment of the present application is shown. As shown in connection with fig. 3, the battery test circuit may specifically include: the device comprises a rectifying circuit, 6 isolation circuits, 6 symmetrically-configured voltage reduction circuits, 2 inductors L1-L2 and a battery BAT1 to be tested; the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of the 6 isolation circuits; the output ends of the 6 isolation circuits are connected with the first input ends of the 6 symmetrically-configured voltage reduction circuits; the second input ends of 2 voltage reduction circuits in the middle of the 6 voltage reduction circuits which are symmetrically arranged are connected, namely the 2 voltage reduction circuits in the middle are connected in series, the output ends of the 4 voltage reduction circuits in the middle are connected with the second input ends of the adjacent voltage reduction circuits, and the 2 voltage reduction circuits except the 4 voltage reduction circuits in the middle, namely the output ends of the 2 voltage reduction circuits at the outermost side are respectively connected with a battery to be tested through an inductor; Q1-Q92 are IGBT1-IGBT92, C1-C8 are capacitors, and T1-T6 are transformers.
As a battery test circuit, the battery test circuit may further include a controller connected to the output terminals of the at least two voltage-reducing circuits; the at least two step-down circuits may include a plurality of first insulated gate bipolar transistors IGBTs;
and the controller is used for controlling the on or off of the first IGBTs.
The controller can be a control chip such as a singlechip, digital signal processing and the like.
The controller can also be used for controlling the on or off of a plurality of second IGBTs in at least two voltage reduction circuits so as to control the output current of the battery to be tested.
As a battery test circuit, the rectifying circuit may include a capacitor; the capacitor is connected with the input ends of at least two isolation circuits;
the capacitor is used for stabilizing direct-current voltage;
and the controller is also used for sampling the voltage of the capacitor.
In addition, the controller can be used for sampling the inductance current connected with the battery to be tested so as to measure the current output by the battery to be tested.
The embodiment of the application provides a battery test circuit, which is used for testing a high-voltage battery, and comprises an alternating-current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage-reducing circuits and an inductor; the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through an inductor; an alternating voltage source for providing an alternating voltage; a rectifying circuit for converting an alternating voltage into a direct voltage; the at least two isolation circuits are used for isolating the direct-current voltage into at least two paths of independent voltages; the at least two voltage reduction circuits are used for converting at least two paths of independent voltages into working voltages of the battery to be tested; and the inductor is used for obtaining the current output by the battery to be tested, comparing the current with the preset current and obtaining the test result of the battery to be tested. Therefore, the battery test circuit provided by the application has the advantages that the direct-current voltage obtained by conversion of the rectifying circuit is isolated into at least two paths of independent voltages through the at least two isolating circuits, the at least two paths of independent voltages are converted into the working voltage of the battery to be tested through the at least two voltage reducing circuits, the working voltage of the battery to be tested is provided by the at least two voltage reducing circuits, the working voltage of the IGBT in the voltage reducing circuits is reduced, the battery test circuit can select the IGBT with a lower voltage level, the IGBT with the lower voltage level has high switching frequency and high dynamic response speed, and the efficiency of testing the high-voltage battery is improved.
Referring to fig. 4, the flowchart of a battery testing method according to an embodiment of the present application is applied to a battery testing circuit, where the battery testing circuit is used for testing a high-voltage battery, and the battery testing circuit includes: the device comprises an alternating current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage reduction circuits, an alternating current voltage source and an inductor; the input end of the rectifying circuit is connected with an alternating current voltage source, and the output end of the rectifying circuit is connected with the input ends of at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through an inductor; an alternating voltage source for providing an alternating voltage; a rectifying circuit for converting an alternating voltage into a direct voltage; the at least two isolation circuits are used for isolating the direct-current voltage into at least two paths of independent voltages; the at least two voltage reduction circuits are used for converting at least two paths of independent voltages into working voltages of the battery to be tested; and the inductor is used for obtaining the current output by the battery to be tested, comparing the current with the preset current and obtaining the test result of the battery to be tested. As shown in connection with fig. 4, the method specifically may include:
s401: the battery to be tested acquires working voltage through at least two voltage reduction circuits.
S402: and outputting current to the inductor by the battery to be tested, and comparing the current with the preset current to obtain a test result of the battery to be tested.
After the battery to be tested obtains the working voltage, the current can be output to the inductor connected with the battery to be tested, and the output current is compared with the preset current to obtain the result of whether the test of the battery to be tested is passed or not.
Based on the above-mentioned related content of S401-S402, it can be known that the electrical testing method of the embodiment of the present application is applied to a battery testing circuit, and the working voltage obtained by the battery to be tested is obtained by isolating the dc voltage obtained by converting the rectifying circuit into at least two independent voltages by at least two isolating circuits, and then converting the at least two independent voltages by at least two voltage-reducing circuits; the operating voltage of the IGBT in the step-down circuit is reduced by improving the operating voltage of the battery to be tested through the at least two step-down circuits, so that the battery test circuit can select the IGBT with a lower voltage level, the IGBT with the lower voltage level has high switching frequency and high dynamic response speed, and the efficiency of testing the high-voltage battery is improved.
The embodiment of the application also provides corresponding equipment and a computer storage medium, which are used for realizing the scheme provided by the embodiment of the application.
The device comprises a memory and a processor, wherein the memory is used for storing a computer program, and the processor is used for executing the computer program so as to enable the device to execute the battery testing method according to any embodiment of the application.
The computer storage medium stores a computer program, and when the computer program is executed, a device running the computer program implements the battery testing method according to any embodiment of the present application.
The "first" and "second" in the names of "first", "second" (where present) and the like in the embodiments of the present application are used for name identification only, and do not represent the first and second in sequence.
It should be noted that, in the present specification, each embodiment is described in a progressive manner, and identical and similar parts of each embodiment are all referred to each other, and each embodiment is mainly described in a different point from other embodiments. In particular, for the method embodiments, since they are substantially similar to the circuit embodiments, the description is relatively simple, and reference is made to the description of the circuit embodiments for relevant points. The circuit embodiments described above are merely illustrative, in which elements illustrated as separate elements may or may not be physically separate, and elements illustrated as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present application without undue burden.
The foregoing is only one specific embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the technical scope of the present application should be included in the scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims (10)
1. A battery test circuit for testing a high voltage battery, the battery test circuit comprising:
the device comprises an alternating-current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage reduction circuits and an inductor; the input end of the rectifying circuit is connected with the alternating voltage source, and the output end of the rectifying circuit is connected with the input ends of the at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through the inductor;
the alternating voltage source is used for providing alternating voltage;
the rectification circuit is used for converting the alternating voltage into direct voltage;
the at least two isolation circuits are used for isolating the direct-current voltage into at least two paths of independent voltages;
the at least two voltage reduction circuits are used for converting the at least two paths of independent voltages into working voltages of the battery to be tested;
the inductor is used for obtaining the current output by the battery to be tested, comparing the current with a preset current, and obtaining the test result of the battery to be tested.
2. The battery test circuit of claim 1, wherein the at least two voltage step-down circuits comprise M voltage step-down circuits, M being ≡2; the output ends of M-1 voltage reduction circuits in the M voltage reduction circuits are connected with the second input ends of adjacent voltage reduction circuits, and the output ends of voltage reduction circuits except for the M-1 voltage reduction circuits in the M voltage reduction circuits are connected with the battery to be tested through the inductor.
3. The battery test circuit of claim 1, wherein the at least two voltage step-down circuits comprise N voltage step-down circuits, N > 3, N being an even number; the second input ends of 2 voltage reduction circuits in the N voltage reduction circuits are connected, the output ends of N-2 voltage reduction circuits comprising the 2 voltage reduction circuits are connected with the second input ends of adjacent voltage reduction circuits, and the output ends of 2 voltage reduction circuits except the N-2 voltage reduction circuits in the N voltage reduction circuits are connected with the battery to be tested through two inductors.
4. The battery test circuit of claim 3, wherein the N voltage step-down circuits comprise symmetrically configured N voltage step-down circuits.
5. The battery test circuit of claim 1, wherein the circuit further comprises: a controller; the controller is connected with the output ends of the at least two voltage reduction circuits; the at least two voltage reduction circuits comprise a plurality of first Insulated Gate Bipolar Transistors (IGBT);
and the controller is used for controlling the on-off of the first IGBTs.
6. The battery test circuit of claim 5, wherein the controller is further configured to sample the current of the inductor.
7. The battery test circuit of claim 5, wherein the rectifying circuit comprises a plurality of second IGBTs;
the controller is also used for controlling the on-off of the plurality of second IGBTs.
8. The circuit of claim 5, wherein the rectifying circuit comprises a capacitor; the capacitor is connected with the input ends of the at least two isolation circuits;
the capacitor is used for stabilizing the direct-current voltage;
the controller is also used for sampling the voltage of the capacitor.
9. A battery testing method, applied to a battery testing circuit for testing a high voltage battery, the battery testing circuit comprising: the device comprises an alternating current voltage source, a rectifying circuit, at least two isolation circuits, at least two voltage reduction circuits, an alternating current voltage source and an inductor; the input end of the rectifying circuit is connected with the alternating voltage source, and the output end of the rectifying circuit is connected with the input ends of the at least two isolation circuits; the output ends of the at least two isolation circuits are connected with the first input ends of the at least two voltage reduction circuits; the output ends of the at least two voltage reduction circuits are connected with the battery to be tested through the inductor; the method comprises the following steps:
the battery to be tested acquires working voltage through the at least two voltage reduction circuits;
and the battery to be tested outputs current to the inductor so as to be compared with a preset current, and a test result of the battery to be tested is obtained.
10. A battery testing apparatus, the apparatus comprising:
a memory for storing a computer program;
a processor for executing the computer program to cause the device to perform the battery testing method of claim 9.
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